Filter cartridge



FIG. 1 is a front view of a filter cartridge showing a first embodiment of my new design;

FIG. 2 is a back view thereof;

FIG. 3 is a left view thereof;

FIG. 4 is a right view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a top perspective view thereof;

FIG. 8 is a front view of a filter cartridge showing a second embodiment of my new design;

FIG. 9 is a back view thereof;

FIG. 10 is a left view thereof;

FIG. 11 is a right view thereof;

FIG. 12 is a top view thereof;

FIG. 13 is a bottom view thereof; and,

FIG. 14 is a top perspective view thereof.

The broken lines shown in the figures depict portions of the filter cartridge that form no part of the claimed design. 

CLAIM The ornamental design for a filter cartridge, as shown and described. 